corbett



UNITED STATES .PATENT FFICE,

V. P. CORBETT, 0F NEW YORK, N. Y.

DEVICE FOR PARTIALLY EXCLUDING DUST FROM RAILROAD-CARS.

Speccaton of Letters Patent No. 13,779, dated November 13, 1855.

To all whom tt may concern:

Be it known that I, VmeiL P. CORBETT, of the city, county, and State of New York, have invented a new and useful Improve ment in Ventilators for Railroad-Cars; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specilication, in which- Figure l, is a vertical longitudinal section of the ventilator applied to the top of a car. Fig. 2, is a vertical transverse section of the same.

Similar letters of reference indicate cor responding parts in the two figures.

- The main object of my invention is to prevent as far as possible the entrance of dust, cinders, etc., into the car along with the air, and the nature of the same consists in having extend up from the inside of the top A, of the car B, a vertical hollow pipe C, which is made open at its lower end and has its upper end C, made aring and covered with wire gauze a, and inclosing said pipe by a horizontal longitudinal chamber D, which has its two ends b, c, made flaring and almost entirely covered by swinging valves E, E, one of which as the car travels in one direction opens and admits dust and air while the other nearly entirely closes and thus prevents the escape of a greater portion of the air along with the dust and cinders in the main current, or through the exhaust passage f, under the valve, which remaining air is caused to change its course by coming in contact with the valve E', and owing to being compressed by the incoming current is caused to rush down through the reticulated cover a, of the pipe C, C', into the car and thus ventilate it in a very pleasant and agreeable manner.

Operation: If the car travels in the direction of the arrow l, a large quantity of air, dust, etc., is caught by the flaring mouth b, and caused to pass into the chamber through the valve E, which opens to the pressure of the air. As the car proceeds the air, dust, etc., come in contact with the iaring portion C, of the pipe C, and are deflected downward by the same, as indicated by the black arrows and owing to being thus de- 'ected get in the main current and necessarily escape with it through the small passage f, which is under the valve E, while the greater portion of the air remains in the chamber on account of the escape being so small and is by reason of the inlet or supply being so large compressed and caused to change its course and as there is no other immediate escape rushes down through the wire gauze a, into the car, as indicated by the blue arrows. IVhen the car travels in the direction of the arrow 2, ,the valve E', of course opens and E, nearly closes, as indicated in red, and the dust and air are operated upon, and operate in the same manner as when the car is traveling in the direc tion of the arrow l. y

It is by having the pipe C, of daring shape that the dust is prevented from entering the car with the air, this shape always giving it a direction downward, and owing to its being heavier than the air it is incapable of rising before the main current carries it through the escape, and it is by having the valves constructed so that small exhaust passages f, y, shall be formed between them and the car, and one shall be almost entirely open while the other is closed, as the car travels in one direction and thus having a larger inlet than exhaust that a greater portion of the air can be retained in the chamber D, compressed and caused to rise above the main current and to enter the car in the manner before stated.

This ventilator has been tried upon some of the cars of the main railroads and found to answer the purpose intended admirably. It is simple, cheap, and convenient of application to cars already in use, which certainly is a very important desideratum. It also is capable of adjusting itself to the direction in which the car is traveling, and is in no way liable to become deranged or to fail in its operation from an accumulation of dust and cinders, as the pressure of the air instantly removes whatever dust may enter the chamber D, as the car moves rapidly along.

Vhat. I claim as my invention, and desire to secure by Letters Patent, is-

1. The employment of the valves E, E, on the ends of the chamber D, when said valves are so constructed as to leave small exhaust passages f, f, when closed, between the bottom of the valves and the car and so arranged that one of them E, for instance shall be open while the other E', is closed,

as the oar travels in one direction and viceconstruction, arrangement, and operation of versa 1f traveling 1n an opposite direction the valves E, E, and Chamber D, substansubstantlally as and for the purposes set tlally as, and for the purpose set forth.

forth. V. P. CORBETT.

2. Having the month C, of the pipe C, Witnesses: elevated above the highest point of the es- A. E. BEACH,

cape passages f, f, in combination With the WM. TUsGH. 

